Coordination compound have great importance in biological systems. In this context which of the living following statements is incorrect ?

Question

( A ) Chlorophylls are green pigments in plants and contain calcium
( B ) Haemoglobin is the red pigment of blood and contains iron
( C ) Carboxypeptidase-A is an enzyme and contains zinc
( D ) Cyanocobalamin is $B_{12}$ and contains cobalt